external/bsd/bind/dist/lib/isc/win32/os.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2004, 2007  Internet Systems Consortium, Inc. ("ISC")
   5  * Copyright (C) 2000-2002  Internet Software Consortium.
   6  *
   7  * Permission to use, copy, modify, and/or distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  12  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  13  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  14  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  15  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  16  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  17  * PERFORMANCE OF THIS SOFTWARE.
  18  */
  19
  20 /* Id: os.c,v 1.8 2007/06/19 23:47:19 tbox Exp */
  21
  22 #include <windows.h>
  23
  24 #include <isc/os.h>
  25
  26 static BOOL bInit = FALSE;
  27 static SYSTEM_INFO SystemInfo;
  28
  29 static void
  30 initialize_action(void) {
  31         if (bInit)
  32                 return;
  33
  34         GetSystemInfo(&SystemInfo);
  35         bInit = TRUE;
  36 }
  37
  38 unsigned int
  39 isc_os_ncpus(void) {
  40         long ncpus = 1;
  41         initialize_action();
  42         ncpus = SystemInfo.dwNumberOfProcessors;
  43         if (ncpus <= 0)
  44                 ncpus = 1;
  45
  46         return ((unsigned int)ncpus);
  47 }